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CVE-2026-4437

nvd nist
Published: Mar 20, 2026Modified: Jul 14, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.

Affected (1)

Products: Gnu: Glibc
Gnu
1 product
Glibc
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Glibc
From 2.34 to 2.43

Related CWEs

CWE-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.

References (2)

Source: 3ff69d7a-14f2-4f67-a097-88dee7810d18
ExploitIssue TrackingPatch
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Timeline

No history available yet.